Bolt-cutter.



T. A. HALL.

BOLT CUTTER.

APPLxoATIoN FILED JAN. et 1909.

Patented June 29, 1909.

M aww' W1 TNESSES THOMAS A. HALL, OF JACKSON, MICHIGAN.

BOLT-CUTTER.

Specification of Letters Patent.

Application led January 6, 1909.

Patented June 29, 1909.

Serial No. 470,980.

To all whom it may concern.'

Be it known that I, THOMAS A. HALL, eiti- Zen of the United States, residing at Jackson, county of Jackson, and State of Michigan,

' have invented certain new and useful Improvements in Bolt-Cutters, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to a bolt cutter, and particularly to a structure involving a fixer and movable cutting aw.

The invention has for an object to provide a head having a fixed cutting jaw and a movable cutting jaw slidingly mounted therein together with operating levers pivoted to the head and having angular extensions with links pivoted thereto and to the movable jaw to form a toggle connection therewith.

Other and further objects and advantages of the invention will be hereinafter fully set forth and the novel features thereof defined by the appended claims.

In the drawing:-Figure 1 is a plan of the tool with a portion of the 'face plate broken away; Fig. 2 is a side elevation thereof; Fig. 3 is a detail section of the cutting aws, and Fig. 4 is a plan of a modified form of the tool.

Like numerals refer to like parts in the several views of the drawing.

, The numeral l() designates the tool head which may be of any desired size or configuration and is formed with the extended arm 1l provided with a seat or recess 13 in which the cutting jaw or tool 12 is removably secured by any desired means, for instance, a screw 14. Mounted in any suitable way in this head is the slide bar 15 having a seat 16 at one end adapted to receive the removably mounted cutting jaw or tool 17 which may be secured thereon by an preferred means, for instance, the opposite y disposed screws 18. This slide jaw is adapted to be operated by means of the hand levers 19 which may be of any preferred form or size, and are pivoted to the head by means of the bolt 20 ex tended through the face plates 28 thereon. This bolt also passes through a guide slot 21 formed in the slide bar 15. The inner ends 22 of the levers 19 are disposed at an angle thereto and also bent laterally so as to pass at opposite sides of the slide bar, as shown at 23 in Fig. 2. The angular ends 22 are connected to the slide bar by means of the links 24 at the opposite sides thereof, these links being pivoted at 25 to the bar and at 26 to each of the levers. This forms a toggle connection between the hand levers and the slide bar so as to secure a great amount of leverage and pressure in the cutting action. Then it is desired to limit the travel of the cutting jaws and )revent their eugagen'ient with each other ainf consequent injury thereto, a screw 27 may be mounted in one of the hand levers 19 and adapted to engage the opposite lever. Extended from the head 1() and secured thereto are face plates 28 at opposite sides which inclose the toggle connection with the slide bar and prevent contact or interference therewith. These plates may be retained in any desired manner, for instance, by means of the bolts or rivets 29 at one end and by the pivot bolt 20 at the opposite end of the plates.

In Fig. 4 a modified form of the invention is shown in which additional links 3() are pivotally connected at 31 to each of the hand levers and to the slide bar at 32. This provides a secondary toggle which greatly relieves the pressure on the pivot bolt for the hand levers.

In the operation of the invention .it will be seen that when the hand levers are separated the movable jaw is withdrawn from the vfixed jaw permitting the tool to embrace a bolt or other object to be out, and these hand levers may be then drawn together into the position shown in Fig. 1 thus exerting the full toggle pressure to force the movable jaw toward the fixed jaw and perform the cutting function. This movable jaw is guided by its mounting in the head and also by the slot therein embracing the pivot bolt for the hand levers, while the angular portion of these levers in connection with the links extending to the slide bar form a toggle. The invention therefore presents a simple, efficient and economically constructed form of cutter adapted for cutting bolts or any other material introduced between the cutter blades thereof. T hese blades being removable may be readily replaced when desired by blades of the same or other construction adapted for different classes of work.

IIaving described my invention and set forth its merits, what I claim and desire to sccure by Letters Patent is 1. A cutting tool comprising a head provided with a 'xed j aw, a movable jaw mounted in said head and having a rearwardly exe tended slotted slide bar, pivoted hand levers having their pivot extended through said slot and each provided with an angular extension beyond its pivot, and connections from said extensions to said slide bar.

2. A cutting tool comprising a head having a fixed jaw, a sliding jaw mounted in said head, hand levers pivoted together and each having an angular extension beyond its pivot, a slide bar havinor an elongated slot through which the hand ever pivot extends and provided with a mounting for the movablejfaw and toggle links from said extensions to the` slide bar.

3. A cutting tool comprising a head provided with a fixed jaw, a movable j aw mounted in said head, hand levers ivoted together and provided with opposite y extending angu'larly disposed portions beyond said pivot, a slide bar carrying said movable jaw and extended to embrace said lever pivot and toggle links from said extensions to the slide bar.

L. A cutting tool comprising a head provided with a fixed j aw, a movable jaw mounted in said head, hand levers 'ivoted together and provided with oppositeiy extending angularly disposed portions beyond said pivot, a slide bar carrying said movable jaw and extended to embrace said lever pivot and toggle links from said extensions and pivoted at the opposite sides of said slide bar.

5. A cutting too-l comprising a head having a xed jaw, a movable jaw mounted in said 1 head and having a rearwardly extending slide bar, hand levers provided with laterally deiieoted angul'arly disposed portions having a pivot extending through a slot in said bar, and links extending from said portions to the opposite sides of said bar.

6. n a cutting toolI a head provided with a xed jaw, a movable j aw mounted therein,

face plates extended from opposite sides of said head, hand levers disposed between said l plates, a pivot extended through said plates `and hand levers, a slide bar carrying said movable jaw and disposed between said levers at their pivot, and link Connections from said levers to the slide bar.

7. In a cutting tool, a head provided with a fixed jaw, a movable jaw mounted in said head, hand levers pivotally supported from said head and having a toggle connection at the front of their pivot with said movable jaw, and links pivotally connected to the hand levers and to. said movable jaw at the rear of the pivot of said levers.

In testimony whereof I my signature in presence of two witnesses.

THOMAS A. HALL.

Witnesses 1 H. EDG-AR CoPrrNs, MARGARET RYAN. 

